code: def main():
      from optparse import OptionParser
  
      parser = OptionParser()
      parser.add_option(
          "-j",
          "--json",
          metavar="FILE",
          nargs=1,
          help="Save output as JSON into file, pass in "
          "'-' to output to stdout",
      )
  
      (options, args) = parser.parse_args()
  
      if options.json == "-":
          options.json = True
  
      show_versions(as_json=options.json)
  
      return 0
  
file_path: catboost/contrib/python/pandas/py2/pandas/util/_print_versions.py
imports: import codecs
  import importlib
  import locale
  import os
  import platform
  import struct
  import subprocess
  import sys
label_desc: Use image node_id 3 for calling a global function with example usage: main() and returns: int